CN112126350B - Recyclable super-amphiphobic composite coating and preparation and application thereof - Google Patents
Recyclable super-amphiphobic composite coating and preparation and application thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09D133/26—Homopolymers or copolymers of acrylamide or methacrylamide
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-containing groups
Abstract
The invention discloses a repeatedly-adhesive and recyclable super-amphiphobic composite coating, and a preparation method and an application thereof. According to the invention, the super-amphiphobic nano particles are innovatively introduced into the viscous hydrogel, the super-amphiphobic composite coating is quickly adhered to different matrixes by utilizing the property that the viscous hydrogel has strong adhesion force after being dehydrated, and the super-amphiphobic composite coating has very strong adhesion force, excellent super-hydrophobic and super-oleophobic properties, self-cleaning property and patterning property, and can be adhered for many times and recycled.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a super-amphiphobic composite coating capable of being repeatedly bonded and recycled, and preparation and application thereof.
Background
The super-amphiphobic surface is a surface which has a contact angle larger than 150 degrees and a rolling angle smaller than 10 degrees to water and oily liquid and has extremely strong repellency to water and oily liquid. Unlike a super-hydrophobic surface which is only hydrophobic, the super-amphiphobic surface not only has important application value in industries relating to oily liquids or organic pollutants, such as the petroleum industry, but also has wider application in the aspects of self-cleaning, antifouling, antibacterial, drag reduction, moisture prevention, corrosion prevention and adhesion prevention relating to oily or organic pollutants. Accordingly, the design and manufacture of superamphiphobic surfaces has received considerable attention in both academic and industrial fields.
Theoretically, the combination of low surface energy chemistry and nano/micro roughness structures is a prerequisite for obtaining a super-amphiphobic surface. After more than ten years of intensive research, researchers have developed various low surface energy composite materials for making super-amphiphobic coatings. Existing low surface energy nanocompositesThe composites generally use fluorinated compounds as low surface energy components and various fillers, such as SiO2、TiO2ZnO, multi-walled carbon nanotubes or raspberry-like polymer particles. However, due to the fragility of the micro/nano-roughness structure and its poor adhesion to the substrate, how to achieve the adhesion of the existing low surface energy composites to different substrates remains a considerable challenge.
To address this inherent limitation, the prior art reports the use of strong commercial binders to provide adhesion between low surface energy composites and different substrates, thereby providing an effective strategy for the practical application of superamphiphobic coatings. However, the nano/micro roughness of the surface of the super-amphiphobic coating is still easily destroyed after long-term use or severe abrasion, and the removal of residues and adhesives thereof is very difficult and even causes damage to the substrate. In addition, in consideration of the high cost of fluorinated compounds and the cumbersome process of manufacturing the nano-component, designing a super-amphiphobic composite coating having multiple uses for different substrates and being recyclable has a very large application value.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention proposes a repeatedly bondable and recyclable super-amphiphobic composite coating (hereinafter, super-amphiphobic composite coating) which is capable of firmly bonding to various substrates and is recyclable and can be bonded many times.
The technical scheme adopted by the invention is as follows:
a super-amphiphobic composite coating comprises an adhesive hydrogel adhesive primer layer and a super-amphiphobic finish paint layer attached to the adhesive hydrogel primer layer.
The super-amphiphobic finish paint layer is formed by super-amphiphobic finish paint, and the preparation raw materials of the super-amphiphobic finish paint comprise: nanoparticles, a fluorinated silane coupling agent, a pH regulator and a solvent. Alkoxy in the fluorinated silane coupling agent can be hydrolyzed under the weak acidic condition to generate silanol (Si-OH) which is further condensed with hydroxyl on the surface of the nanoparticles, so that the low surface energy modification of the nanoparticles is realized to form the super-amphiphobic nanoparticles, and the dispersibility of the nanoparticles is improved.
The super-amphiphobic finish paint comprises the following raw materials in percentage by mass:
0.5wt% -3 wt% of nano particles
1-5 wt% of fluorinated silane coupling agent
0.5wt% -3 wt% of pH regulator
75 to 98 weight percent of solvent.
The nano particles are selected from nano SiO2TiO 2 nanoparticles2At least one of nano ZnO, nano PTFE (polytetrafluoroethylene) and multi-wall carbon nano tube.
The particle size of the nanoparticles is 5-200 nm.
The fluorinated silane coupling agent is at least one selected from heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, tridecafluorooctyltriethoxysilane and dodecafluoroheptylpropyltrimethoxysilane.
The pH regulator is selected from acetic acid. The acetic acid can make the system in weak acidity, and promote the alkoxy in the fluorinated silane coupling agent to be hydrolyzed to generate silanol (Si-OH). Acetic acid is most commonly used because it is less corrosive, safer, and easy to adjust pH.
The solvent is at least one of n-hexane, acetone, ethyl acetate and cyclohexane. The solvent in the super-amphiphobic finish paint can not seriously affect the adhesive property of the viscous hydrogel adhesive primer layer, can effectively disperse the nano particles modified by the fluorosilane, and has the characteristic of easy volatilization, so that the super-amphiphobic property can be quickly generated at room temperature by the finish paint layer. The inventor screens a plurality of solvents, and finds that n-hexane, acetone, ethyl acetate and cyclohexane can simultaneously meet the requirements, and other solvents influence the adhesion performance of the adhesive hydrogel primer layer, or have poor dispersibility and slow volatilization, so that the solvent is difficult to be used for preparing the super-amphiphobic composite coating.
The adhesive hydrogel primer layer is composed of an adhesive hydrogel, and the adhesive hydrogel is obtained by free radical polymerization of monomers of hydroxyethyl methacrylate and acrylamide and a crosslinking agent of hexamethylene diisocyanate-trimer. The adhesive hydrogel has strong adhesive capacity after dehydration and weak adhesive capacity after water absorption and swelling, and has reversible adhesive force which can be regulated and controlled through a water absorption and dehydration process.
Specifically, the preparation method of the adhesive hydrogel comprises the following steps: hydroxyethyl methacrylate, acrylamide and hexamethylene diisocyanate-trimer are mixed and subjected to radical polymerization to obtain the adhesive hydrogel.
The free radical polymerization reaction temperature is 50-90 ℃, and preferably 90 ℃. The viscous hydrogel obtained by free radical polymerization at higher temperature has a loose network structure and shorter molecular chains; the viscous hydrogel obtained by free radical polymerization at a lower temperature has a relatively fixed network structure and longer molecular chains. The molecular chain length affects molecular chain flexibility and exchange of hydrogen bonds, thereby affecting adhesion capability. The length of the hydrogel polymer molecule chain can be regulated and controlled by selecting proper free radical polymerization temperature, and hydrogel with proper viscosity is obtained.
The thickness of the super-amphiphobic finish paint layer is 10-20 mu m.
The thickness of the super-amphiphobic composite coating is 350-370 mu m.
The ratio of the volume of the super-amphiphobic finish to the surface area of the viscous hydrogel primer layer is 1-1.5 ml:1in, preferably 1.5ml:1 in. The invention also provides a preparation method of the super-amphiphobic composite coating, which comprises the following steps:
(1) preparing an adhesive hydrogel primer layer;
(2) attaching the super-amphiphobic finish paint to the adhesive hydrogel primer layer to form a super-amphiphobic finish paint layer;
(3) the adhesive hydrogel primer layer was dehydrated.
In step (1), the adhesive hydrogel primer layer is prepared by adhering an adhesive hydrogel to the surface of a substrate.
The preparation method of the super-amphiphobic finish paint comprises the steps of mixing the nano particles, the solvent, the fluorinated silane coupling agent and the pH regulator, and reacting to obtain the super-amphiphobic finish paint.
Specifically, the nano particles are dispersed in a solvent, and then a mixed solution of a fluorinated silane coupling agent and a pH regulator is added for reaction. The reaction temperature is 50-70 ℃, the reaction time is 3-6 h, the reaction is carried out in stirring, and the stirring speed is 600-1200 r/min.
In the step (2), the super-amphiphobic finishing paint is attached to the adhesive hydrogel primer layer by adopting a spraying method. For example, the superamphiphobic topcoat was charged into a spray gun (0.25mm nozzle diameter, 30psi operating air pressure) and sprayed onto the surface of the tacky hydrogel primer at a distance of 15cm at a rate of 1.5 ml/in. The spraying mode is adopted, so that nano particles in the super-amphiphobic finish paint are more easily and uniformly distributed on the surface of the viscous hydrogel primer layer to form a stacked appearance, and air is embedded into the nano structure, so that the direct contact area of liquid and materials is reduced.
In the step (3), the dehydration temperature is 20-60 ℃, and the dehydration time is 24-36 h. Since the adhesion of the adhesive hydrogel primer layer after dehydration is enhanced, and the dehydration sequence starts from the outer surface of the adhesive hydrogel along with the self-adaptation of the adhesive hydrogel primer layer to the attachment and the dehydration hardening phenomenon in the dehydration process, the adhesive hydrogel primer layer is not beneficial to the distribution of nano particles in the super-amphiphobic finish and the embedding of air after dehydration, and the super-amphiphobic finish is required to be dehydrated after being attached to the adhesive hydrogel primer layer.
The substrate is selected from any one of glass, wood, ceramic and metal.
The invention also provides application of the super-amphiphobic composite coating in surface self-cleaning and antigen oil adhesion. Applications in antigen oil adhesion may include applications in the preparation of crude oil storage vessels, crude oil transfer vessels, crude oil transport structures (e.g., pipes, channels, valves, etc.).
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the super-amphiphobic nanoparticles are innovatively introduced into the adhesive hydrogel, and the super-amphiphobic composite coating is quickly adhered to different matrixes by utilizing the property that the adhesive hydrogel has strong adhesive force after being dehydrated, so that the super-amphiphobic composite coating has very strong adhesive force.
(2) By utilizing the property that the viscosity of the viscous hydrogel is weakened after the viscous hydrogel absorbs water and swells, the bonding strength of the coating can be reversible by controlling the swelling degree of the cross section of the super-amphiphobic composite coating, and the super-amphiphobic composite coating can be bonded for multiple times and can be recycled.
(3) The super-amphiphobic composite coating has excellent super-hydrophobic and super-oleophobic performance, self-cleaning performance and patterning performance, the surface of a coating film still keeps good liquid repellency after abrasion treatment, and also keeps excellent anti-adhesion capability to viscous crude oil with complex chemical components, so that the super-amphiphobic composite coating can be applied to the fields of self-cleaning, antigen oil adhesion, patterning and the like, and can be applied to surface self-cleaning of a plurality of infrastructures of petroleum industry, such as wellholes, pipelines and containers.
(4) The super-amphiphobic composite coating is environment-friendly, safe and high in cost performance.
(5) The preparation method of the super-amphiphobic composite coating is simple and easy to implement.
Drawings
FIG. 1 is a scanning electron micrograph of a surface (A) and a cross-section (B) of a super-amphiphobic composite coating;
FIG. 2 is a photograph (A) showing the contact angle test results of water, n-hexadecane and crude oil on the surface of the super-amphiphobic composite coating and a photograph (B) showing the antigen-oil adhesion performance of the super-amphiphobic composite coating;
FIG. 3 is a photograph of water and n-hexadecane on ceramic, glass, wood and metal surfaces bonded with a super-amphiphobic composite coating;
FIG. 4 is a graph of the shear strength of a super-amphiphobic composite coating on the surface of ceramic, glass, wood and metal substrates;
FIG. 5 is a schematic view of a process for removing and re-bonding a super-amphiphobic composite coating;
FIG. 6 is a graph of shear strength of a super-amphiphobic composite coating at different bonding times;
FIG. 7 is a schematic view of a recycling process of the super-amphiphobic composite coating;
FIG. 8 shows the results of the abrasion resistance test of the super-amphiphobic composite coating;
FIG. 9 is a photograph showing the self-cleaning performance of a super-amphiphobic composite coating;
fig. 10 is a photograph showing the patterning performance of the super-amphiphobic composite coating.
Detailed Description
The technical solution of the present invention is further described below with reference to specific examples.
The invention provides a super-amphiphobic composite coating, which comprises an adhesive hydrogel adhesive primer layer and a super-amphiphobic finish paint layer attached to the adhesive hydrogel primer layer.
The preparation method of the super-amphiphobic composite coating comprises the following steps:
(1) dissolving hexamethylene diisocyanate trimer in anhydrous acetone to obtain hexamethylene diisocyanate trimer solution. Ammonium persulfate (initiator, dosage is 1% of total monomer mass) and acrylamide are respectively added into deionized water to be dissolved, and then hydroxyethyl methacrylate is dispersed into acrylamide solution to obtain monomer solution. The hexamethylene diisocyanate trimer solution was then mixed with the monomer solution, and the accelerator (tetramethylethylenediamine, in an amount of 5% of the initiator) was added and heated at 90 ℃ for 150 s. Finally, a viscous hydrogel was obtained after further reaction at room temperature for 1 h. Wherein the proportion of hexamethylene diisocyanate tripolymer, ammonium persulfate, acrylamide, hydroxyethyl methacrylate, anhydrous acetone and water is 0.03 g: 0.1 g: 7.1 g: 2.0 g: 0.8 mL: 23.7 mL.
More specifically, the preparation of adhesive hydrogels and the properties of adhesive hydrogels can be found in the literature: chen R, Xu X, Yu D, et al. temperature-regulated flexibility of polymer chains in rapidity self-healing hydrogels [ J ]. NPG Asia Materials,2019,11(1): 1-15.
The adhesive hydrogel is adhered to the surface of a substrate selected from any one of glass, wood, ceramic and metal to form an adhesive hydrogel primer layer.
(2) According to the composition and the proportion shown in the table 1, firstly, nano particles are uniformly dispersed in a solvent by ultrasonic waves, then the nano particles are transferred to a reaction kettle at the temperature of 60 ℃, a mixed solution of a fluorinated silane coupling agent and acetic acid is added, and then the super-amphiphobic finish paint is prepared by heat preservation reaction for 4 hours at the speed of 800 r/min.
Then the super-amphiphobic finish paint is filled into a spray gun (the diameter of a nozzle is 0.25mm, and the operating air pressure is 30 psi); and spraying the super-amphiphobic finish paint at a position 15cm away from the viscous hydrogel primer layer by adopting a spraying process, wherein the spraying amount is 1.5ml/in, and a super-amphiphobic finish paint layer with the thickness of 15 mu m is formed.
(3) And then the obtained product is transferred to a 50 ℃ oven for dehydration for 30 hours, and the super-amphiphobic composite coating with 350 mu m thickness and multiple stickiness and recyclability is obtained.
TABLE 1 super-amphiphobic top-coat composition and formulation
By taking the example 4 as an example, the super-amphiphobic composite coating prepared by the method is subjected to morphology and performance tests, and the results are as follows:
(1) morphology of
FIG. 1 is a scanning electron micrograph of the surface (left) and cross-section (right) of the super-amphiphobic composite coating (substrate selected from glass) of example 4. The figure shows that the surface of the super-amphiphobic composite coating is distributed with uniform fluorinated silane modified nano silicon dioxide particles with nano sizes, and the surface of the coating presents micro-nano roughness.
(2) Super amphiphobic property
Water, n-hexadecane and crude oil were dropped on the surface of the super-amphiphobic composite coating (glass substrate), and the contact angle of each solvent on the surface of the super-amphiphobic composite coating was measured, and the result is shown in fig. 2A. The detection shows that water, n-hexadecane and crude oil have contact angles (157.2 degrees of water, 152.8 degrees of n-hexadecane and 152.9 degrees of crude oil) of more than 150 degrees on the surface of the super-amphiphobic composite coating, which indicates that the coating has excellent super-amphiphobic property.
Moreover, after the wood adhered with the super-amphiphobic composite coating is taken out by soaking the crude oil, the surface of the super-amphiphobic composite coating is not adhered with the crude oil, as shown in fig. 2B.
(3) Suitability for base material
Water and n-hexadecane were dropped on the surface of the super-amphiphobic composite coating using ceramic, glass, wood and metal as substrates, respectively, and the results are shown in fig. 3. It can be seen that the surfaces of the super-amphiphobic composite coatings on different substrates with water and n-hexadecane all remained spherical, reflecting that the super-amphiphobic composite coating of the present invention can be applied to various substrates.
The shear strength of the super-amphiphobic composite coatings on the surfaces of different substrates was tested, and the results are shown in fig. 4. It can be seen from the figure that the super-amphiphobic composite coating has strong adhesion on each substrate, and the adhesion on glass, wood and ceramic is particularly good.
(4) Recycling and recoverability
After water is injected into the edge of the super-amphiphobic composite coating on the glass surface, the super-amphiphobic composite coating swells and can be easily removed from the glass surface. The detached super-amphiphobic composite coating was collected and then bonded to the wood surface, and after dehydration for 30h at room temperature, it was found that the super-amphiphobic composite coating could still be firmly bonded to the wood surface, as shown in fig. 5.
In combination with the change of the shear strength of the super-amphiphobic composite coating (glass substrate, dehydrated for 30h at room temperature) along with the change of the bonding times, the change of the shear strength after three times of repeated bonding tests is small, and the change of the shear strength is kept above 1600 KPa.
After the super-amphiphobic composite coating (glass substrate) is completely soaked in water for about 2 hours, the particles in the super-amphiphobic finish paint layer are found to fall off from the surface of the adhesive hydrogel primer layer, and meanwhile, the adhesive strength of the adhesive hydrogel primer layer to the substrate is reduced, and the particles gradually fall off from the surface of the substrate. The particles and the viscous hydrogel are then collected and the recovered viscous hydrogel is bonded to the glass surface again, and the recovered particles are sprayed on the recovered viscous hydrogel primer which is dehydrated and becomes viscous, so as to successfully prepare the recovered coating, as shown in fig. 7, further showing that the super-amphiphobic composite coating of the invention can be recycled.
(5) Rub resistance
The super-amphiphobic composite coating (glass substrate) was rubbed with a rubbing machine (load 50g), and the contact angle and the rolling angle of water and hexadecane on the surface of the rubbed super-amphiphobic composite coating were measured, and the results are shown in fig. 8. It can be seen from the figure that the surface of the coating still keeps good liquid repellency after being rubbed by a rubbing machine for 50 times under the condition of 50g load, and the super-amphiphobic composite coating has good friction resistance.
(6) Self-cleaning capability
Carbon black was coated on the surface of the super-amphiphobic composite coating (glass substrate) and then washed with a small amount of water, and as a result, it was found that the carbon black was easily carried away by rolling water droplets, as shown in fig. 9. In contrast, if the carbon black is removed from the surface of a conventional material, a larger amount and a larger pressure of water are required, and water stains remain.
(7) Patterning
Fig. 10 is a photograph showing the patterning performance of the super-amphiphobic composite coating. It can be seen that the coating can be patterned for application (e.g., to make a water and oil repellent trademark or other marker requiring water and oil repellency) and retains the super-amphiphobic properties.
The above is a relevant performance test diagram of the super-amphiphobic composite coating on the example 4, the performances of the super-amphiphobic composite coatings prepared by other examples are consistent with those of the example 4, and in order to avoid repetition, the performances are not provided one by one.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. The super-amphiphobic composite coating capable of being repeatedly bonded and recycled is characterized in that: the super-amphiphobic finishing coat comprises a viscous hydrogel priming paint layer and a super-amphiphobic finishing coat layer attached to the viscous hydrogel priming paint layer, wherein the super-amphiphobic finishing coat layer is formed by a super-amphiphobic finishing coat, and the preparation raw materials of the super-amphiphobic finishing coat comprise: nano particles, a fluorinated silane coupling agent, a pH regulator and a solvent; wherein the solvent is at least one selected from n-hexane, acetone, ethyl acetate and cyclohexane;
the preparation method of the repeatedly-adhesive and recyclable super-amphiphobic composite coating comprises the following steps:
(1) preparing an adhesive hydrogel primer layer;
(2) attaching the super-amphiphobic finish paint to the adhesive hydrogel primer layer to form a super-amphiphobic finish paint layer;
(3) the adhesive hydrogel primer layer was dehydrated.
2. The repeatedly bondable and recyclable super-amphiphobic composite coating according to claim 1, wherein: the super-amphiphobic finish paint comprises the following raw materials in percentage by mass:
0.5wt% -3 wt% of nano particles
1-5 wt% of fluorinated silane coupling agent
0.5wt% -3 wt% of pH regulator
75 to 98 weight percent of solvent.
3. The repeatedly bondable and recyclable super-amphiphobic composite coating according to claim 1 or 2, characterized in that: the nano particles are selected from nano SiO2TiO 2 nanoparticles2At least one of nano ZnO, nano PTFE and multi-wall carbon nano tube.
4. The repeatedly bondable and recyclable super-amphiphobic composite coating according to claim 1 or 2, characterized in that: the fluorinated silane coupling agent is at least one selected from heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, tridecafluorooctyltriethoxysilane and dodecafluoroheptylpropyltrimethoxysilane.
5. The repeatedly bondable and recyclable super-amphiphobic composite coating according to claim 1 or 2, characterized in that: the pH regulator is selected from acetic acid.
6. The repeatedly bondable and recyclable super-amphiphobic composite coating according to claim 1, wherein: the adhesive hydrogel primer layer is composed of an adhesive hydrogel, and the adhesive hydrogel is obtained by free radical polymerization of monomers of hydroxyethyl methacrylate and acrylamide and a crosslinking agent of hexamethylene diisocyanate-trimer.
7. A method for preparing the repeatedly-adhesive and recyclable super-amphiphobic composite coating according to any one of claims 1 to 6, characterized by comprising the following steps: the method comprises the following steps:
(1) preparing an adhesive hydrogel primer layer;
(2) attaching the super-amphiphobic finish paint to the adhesive hydrogel primer layer to form a super-amphiphobic finish paint layer;
(3) the adhesive hydrogel primer layer was dehydrated.
8. Use of the re-bondable and recyclable super-amphiphobic composite coating according to any one of claims 1 to 6 for surface self-cleaning, antigen-oil adhesion or patterning.
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| CN202010771829.7A CN112126350B (en) | 2020-08-04 | 2020-08-04 | Recyclable super-amphiphobic composite coating and preparation and application thereof |
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| CN202010771829.7A CN112126350B (en) | 2020-08-04 | 2020-08-04 | Recyclable super-amphiphobic composite coating and preparation and application thereof |
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